[Beowulf] New member, upgrading our existing Beowulf cluster

[Peter Kjellstrom]

On Thursday 03 December 2009, Prentice Bisbal wrote:
> Hearns, John wrote:
> > I was wondering if anyone has actual experience with running more than
> > one node from a single power supply. Even just two boards on one PSU
> > would be nice. We will be using barely 200W per node for 50 nodes and it
> > just seems like a big waste to buy 50 power supply units. I have read
> > the old posts but did not see any reports of success.
> >
> > Look at the Supermicro twin systems, they have two motherboards in 1U or
> > four motherboards in 2U.
> >
> > I believe HP have similar.
>
> What I learned at SC09:
>
> HP does make twin nodes similar to SuperMicro, but the HP nodes are not
> hot-swappable,

Almost true, the DL1000 is not hot-swapable, the SL6000 kind of is (you can 
pull a 1U sub-unit which can be either one or two nodes).

> if a single node goes down, you need to take down all the 
> nodes in the chassis before you can remove the dead node. Not very
> practical. The SuperMicro nodes are definitely hot-swappable.

Almost true, Supermicro has (or at least had) both hot-swap and non-hot-swap.

/Peter
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